Process for taking prints, in particular for the making of...

C - Chemistry – Metallurgy – 08 – L

Patent

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18/905

C08L 75/04 (2006.01) A43B 7/28 (2006.01) A43D 1/02 (2006.01) A61B 5/107 (2006.01)

Patent

CA 2207987

The object of the invention is a process for taking prints from a part of the anatomy of a human being, in particular a foot, for the purposes of making orthopedic shoes. The process is characterized by the following stages: - production of a preform with a single profile made of a shape-retaining polymer material, essentially rigid at room temperature and flexible and elastic at working temperature, - warmup of the preform to working temperature, - wrapping of the preform around the part concerned, - a waiting period for the preform to cool to below its working temperature, - removal of the preform from the part concerned and pouring of the positive form, and - return of the preform to the initial single profile by again raising the working temperature without constraint. The invention also includes a set-up for implementing the process.

L'objet de l'invention est un procédé de prises d'empreintes d'une partie de l'anatomie d'un être humain, notamment d'un pied pour la réalisation de chaussures en orthopédie, caractérisé en ce qu'il comprend les étapes suivantes: - réalisation d'une préforme d'un profil simple donné en matériau polymère à mémoire de forme, sensiblement rigide à température ambiante et souple et élastique à sa température de travail, - mise en température de travail de la préforme, - plaquage de la préforme sur la partie concernée, - attente du refroidissement de la préforme en dessous de sa température de travail, - retrait de la préforme de la partie concernée et coulage de la forme positive, et - remise de la préforme au profil simple initial par montée à nouveau à la température de travail sans contrainte L'invention a aussi pour objet une composition permettant de mettre en oeuvre le procédé.

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